Doesn't matter which OS you're running, somewhere in there, your system depends on Perl to get stuff done. Perl turned 25 years old on December 19th. Though venerable old version 5 remains the most popular, many have moved onto Perl 6, which intentionally broke compatibility and still isn't officially 'production ready.' I can't imagine administering a system without Perl though, so tonight I'm raising a glass of champagne in the direction of founder and creator Larry Wall.